I just looked at some bearings on eBay and it looks like the locating tab is only on 1/2 of the shell and it has an oil groove in it. The other 1/2 looks like what is in the picture. I think you got the set I was looking at the other day because they seem to be gone now. Good luck, I think you are OK.
Bearings


"I wonder if God created man because he was disappointed in the monkey?" Mark Twain